Seven Republican presidential hopefuls will take the stage Wednesday night in Simi Valley, California for the second GOP presidential debate, while former President Donald Trump will be speaking in the suburbs of Detroit. The debate will be an opportunity for the other candidates to make their case for the nomination, while Trump will be criticizing President Joe Biden's efforts to fight climate change. Moderated by Fox News anchor Bret Baier, the debate will be the second of four before the primaries begin in February.